Ground-Based Remote Sensing of Total Columnar CO2, CH4, and CO Using EM27/SUN FTIR Spectrometer at a Suburban Location (Shadnagar) in India and Validation of Sentinel-5P/TROPOMI

IF 4 3区 地球科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Vijay Kumar Sagar, Mahesh Pathakoti, Mahalakshmi D.V., Rajan K.S., S. M.V.R., F. Hase, D. Dubravica, M. Sha
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引用次数: 2

Abstract

Greenhouse gases (GHGs) play an important role in controlling local air pollution as well as climate change. In this study, we retrieved column-averaged dry-air ( $X$ ) mole fractions of carbon dioxide (CO2), methane (CH4), and carbon monoxide (CO) using a ground-based EM27/SUN Fourier transform infrared spectrometer (FTIR). The EM27/SUN spectrometers are widely in use in the COllaborative Carbon Column Observing Network (COCCON). The PROFFAST software provided by COCCON has been used to analyze the measured atmospheric solar absorption spectra. In this letter, the diurnal variation and the time series of daily averaged $X$ CO2, $X$ CH4, and $X$ CO covering the period from December 2020 to May 2021 are analyzed. The maximum values of $X$ CO2, $X$ CH4, and $X$ CO are observed to be 420.57 ppm, 1.93 ppm, and 170.40 ppb, respectively. Less diurnal but clear seasonal changes are observed during the study period. $X$ CH4 and $X$ CO from the Sentinel-5Precursor (S5P)/TROPOspheric Monitoring Instrument (TROPOMI) are compared against the EM27/SUN retrievals. The correlation coefficient for the EM27/SUN retrieved $X$ CH4 and $X$ CO, with the S5P/TROPOMI products, are 0.75 and 0.94, respectively.
在印度郊区(沙德纳格尔)使用EM27/SUN FTIR光谱仪对总柱状CO2、CH4和CO进行地面遥感,并验证Sentinel-5P/TROPOMI
温室气体在控制当地空气污染和气候变化方面发挥着重要作用。在这项研究中,我们使用地面EM27/SUN傅里叶变换红外光谱仪(FTIR)检索了二氧化碳(CO2)、甲烷(CH4)和一氧化碳(CO)的柱平均干空气($X$)摩尔分数。EM27/SUN光谱仪广泛用于实验室碳柱观测网络(COCCON)。利用COCCON提供的PROFFAST软件对实测的大气太阳吸收光谱进行了分析。在这封信中,分析了2020年12月至2021年5月期间日均$X$CO2、$X$CH4和$X$CO的日变化和时间序列。观测到$X$CO2、$X$CH4和$X$CO的最大值分别为420.57 ppm、1.93 ppm和170.40 ppb。在研究期间,观察到的昼夜变化较少,但季节变化明显$将Sentinel-5前体(S5P)/TROPOSphere监测仪器(TROPOMI)的X$CH4和$X$CO与EM27/SUN反演结果进行比较。EM27/SUN回收的$X$CH4和$X$CO与S5P/TROPOMI产品的相关系数分别为0.75和0.94。
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来源期刊
IEEE Geoscience and Remote Sensing Letters
IEEE Geoscience and Remote Sensing Letters 工程技术-地球化学与地球物理
CiteScore
7.60
自引率
12.50%
发文量
1113
审稿时长
3.4 months
期刊介绍: IEEE Geoscience and Remote Sensing Letters (GRSL) is a monthly publication for short papers (maximum length 5 pages) addressing new ideas and formative concepts in remote sensing as well as important new and timely results and concepts. Papers should relate to the theory, concepts and techniques of science and engineering as applied to sensing the earth, oceans, atmosphere, and space, and the processing, interpretation, and dissemination of this information. The technical content of papers must be both new and significant. Experimental data must be complete and include sufficient description of experimental apparatus, methods, and relevant experimental conditions. GRSL encourages the incorporation of "extended objects" or "multimedia" such as animations to enhance the shorter papers.
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